Question

即使我做错了查询，Mysql PDO执行总是返回true：

try {
    $sql = $this->db->prepare("INSERT INTO orders (total_price) VALUES ('not_int');");
    $result = $sql->execute();  // WHY TRUE??
} catch (Exception $e) {
    die("Oh noes! There's an error in the query!");
}

在表格中，列的类型＆＃39; total_price＆＃39;是INT。异常也没有捕获（PDO :: ATTR_ERRMODE是PDO :: ERRMODE_EXCEPTION）。在＆total #price＆＃39;插入＆＃39; 0＆＃39;。我尝试使用：

$total_price = "not_int";
$is_int = $sql->bindParam(:total_price, $total_price, PDO::PARAM_INT);

但也返回TRUE（$ is_int为真）

Answer 1

实际上，“INSERT INTO orders（total_price）VALUES（'not_int'）;”确实有效。

那是因为'not_int'被转换为0 ，所以如果你检查你的表，你必须找到一个0为'total_price'的新条目。

for '$ result = $ sql-＆gt; execute（）;'原因是它会返回true;

Answer 2

触发错误的PDO查询应该抛出异常。触发警告的查询不应该。

无效数据的根行为是MySQL特性，与PHP或PDO无关 - 您可以在纯SQL中重现它：

mysql> CREATE TABLE orders (
    ->  orders_id INT(10) UNSIGNED AUTO_INCREMENT,
    ->  total_price INT,
    ->  PRIMARY KEY (orders_id)
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql> SET @@SESSION.sql_mode='';
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO orders (total_price) VALUES ('not_int');
Query OK, 1 row affected, 1 warning (0.00 sec)

mysql> SHOW WARNINGS;
+---------+------+----------------------------------------------------------------------+
| Level   | Code | Message                                                              |
+---------+------+----------------------------------------------------------------------+
| Warning | 1366 | Incorrect integer value: 'not_int' for column 'total_price' at row 1 |
+---------+------+----------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT * FROM orders;
+-----------+-------------+
| orders_id | total_price |
+-----------+-------------+
|         1 |           0 |
+-----------+-------------+
1 row in set (0.00 sec)

mysql> SET @@SESSION.sql_mode='TRADITIONAL';
Query OK, 0 rows affected (0.00 sec)

mysql> INSERT INTO orders (total_price) VALUES ('not_int');
ERROR 1366 (HY000): Incorrect integer value: 'not_int' for column 'total_price' at row 1

Answer 3

试试这个：

try {
    $sql = $this->db->prepare("INSERT INTO orders (total_price) VALUES ('not_int');");
    $result = $sql->execute();  // WHY TRUE??
catch( PDOException $e ) {
    die("Oh noes! There's an error in the query!");
}

Answer 4

功能PDOStatement :: excute - ＆gt;返回值只是布尔值

错误的案例：

$stmt = $pdo->prepare("Your Query");
...
$result = $stmt->execute();
$result->fetch(); // is only boolean

试一试：

$stmt = $pdo->prepare("Your Query");
...
$result = $stmt->execute();
$stmt->fetch(); // return (PDOStatement) or false on failure

Mysql PDO执行总是返回TRUE

4 个答案: